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if-let

core-api



    macro
    boot.janet on line 749, column 1

    (if-let bindings tru &opt fal)

    Make multiple bindings, and if all are truthy, evaluate the `tru` 
    form. If any are false or nil, evaluate the `fal` form. Bindings 
    have the same syntax as the `let` macro.

See also:when-let2 examplesSign in to add an example

(if-let [x true 
         y (not (not x))]
  :a
  :b)
# => :a

sogaiuPlayground

(if-let [x true 
         y (not x)]
  :a
  :b)
# => :b

sogaiuPlayground